If there is an air pocket, that could do it. Bleed out the air. If the gauge is
still out, check the sending unit with a meter. It provides the ground
connection for the gauge. If you ground the gauge wire, the gauge should
read full scale (hot).

i fixed it -- i added more fluid with the engine running for about five min -
then disconnected the battery and all lights went off and gauges started
working - still hear a little gurgle in heater core but that should go away in
a few long drives -- also played with the temp sensor maybe that did
some thing as well

my 2001 Land Rover Discovery SE7 recently started having minor issues, the LED temp light stays on the
temp needle will cycle from bottom to top once the key is turned but will only stay at the botto...

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